======================================
| [    8.666745][  T169] softirqs last disabled at (24321): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    8.666748][  T169] Preemption disabled at:
| [    8.666749][  T169] vprintk_emit (kernel/printk/printk.c:2471)
| [    8.666757][  T169] Tainted: [W]=WARN
[    8.666758][  T169] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.666759][  T169] Call Trace:
[    8.666761][  T169]  <TASK>
[    8.666762][  T169]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    8.666768][  T169]  ? vprintk_emit (kernel/printk/printk.c:2471)
[    8.666770][  T169]  __might_resched.cold (kernel/sched/core.c:9234)
[    8.666774][  T169]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    8.666778][  T169]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[    8.666782][  T169]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[    8.666784][  T169]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    8.666790][  T169]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[    8.666793][  T169]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    8.666795][  T169]  put_chars (drivers/char/virtio_console.c:1176)
[    8.666798][  T169]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    8.666801][  T169]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    8.666806][  T169]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    8.666812][  T169]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    8.666814][  T169]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.666817][  T169]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    8.666821][  T169]  console_emit_next_record (kernel/printk/printk.c:3183)
[    8.666825][  T169]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    8.666828][  T169]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.666830][  T169]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    8.666834][  T169]  console_flush_one_record (kernel/printk/printk.c:3268)
[    8.666837][  T169]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    8.666839][  T169]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    8.666844][  T169]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    8.666846][  T169]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    8.666848][  T169]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.666850][  T169]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    8.666853][  T169]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    8.666854][  T169]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    8.666857][  T169]  vprintk_emit (kernel/printk/printk.c:2479)
[    8.666861][  T169]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    8.666862][  T169]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[    8.666866][  T169]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    8.666867][  T169]  ? fast_dput (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) fs/dcache.c:948 (discriminator 2))
[    8.666872][  T169]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.666876][  T169]  _printk (kernel/printk/printk.c:2504)
[    8.666879][  T169]  ? snapshot_read.cold (user.c:?)
[    8.666882][  T169]  ? __up_write (kernel/locking/rwsem.c:1422 (discriminator 1))
[    8.666885][  T169]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.666889][  T169]  ? configfs_register_subsystem (./include/linux/instrumented.h:112 ./include/linux/atomic/atomic-instrumented.h:1383 fs/configfs/dir.c:173 fs/configfs/dir.c:171 fs/configfs/dir.c:1929)
[    8.666894][  T169] init_netconsole (drivers/net/netconsole.c:1286) netconsole
[    8.666897][  T169]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.666904][  T169]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.666906][  T169]  do_one_initcall (init/main.c:1357)
[    8.666910][  T169]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[    8.666914][  T169]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[    8.666917][  T169]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[    8.666922][  T169]  do_init_module (kernel/module/main.c:3117)
[    8.666926][  T169]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[    8.666930][  T169]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[    8.666933][  T169]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[    8.666936][  T169]  load_module (kernel/module/main.c:3593)
[    8.666943][  T169]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[    8.666946][  T169]  ? __ia32_sys_fsconfig (??:?)
[    8.666949][  T169]  ? ovl_real_file (fs/overlayfs/file.c:195)
[    8.666953][  T169]  ? backing_file_read_iter (fs/backing-file.c:211)
[    8.666956][  T169]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    8.666960][  T169]  init_module_from_file (kernel/module/main.c:3790)
[    8.666963][  T169]  ? __do_sys_init_module (kernel/module/main.c:3664)
[    8.666970][  T169]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    8.666974][  T169]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[    8.666976][  T169]  idempotent_init_module (kernel/module/main.c:3802)
[    8.666980][  T169]  ? init_module_from_file (kernel/module/main.c:3791)
[    8.666986][  T169]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.666988][  T169]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.666993][  T169]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[    8.666995][  T169]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    8.666999][  T169]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    8.667001][  T169]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    8.667003][  T169]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.667005][  T169] RIP: 0033:0x7f0c2b94537d
[    8.667009][  T169] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4b aa 0f 00 f7 d8 64 89 01 48
All code
========
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 
   c:	90                   	nop
   d:	f3 0f 1e fa          	endbr64
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa85
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa5b
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    8.667010][  T169] RSP: 002b:00007ffe009b3f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    8.667013][  T169] RAX: ffffffffffffffda RBX: 000055e304090700 RCX: 00007f0c2b94537d
[    8.667014][  T169] RDX: 0000000000000000 RSI: 000055e2d5459ffd RDI: 0000000000000005
[    8.667015][  T169] RBP: 00007ffe009b3ff0 R08: 0000000000000000 R09: 0000000000000000
[    8.667016][  T169] R10: 0000000000000000 R11: 0000000000000246 R12: 000055e2d5459ffd
[    8.667017][  T169] R13: 000055e304090810 R14: 0000000000040000 R15: 0000000000000000
| [   10.726541][  T221] softirqs last disabled at (11733): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   10.726543][  T221] Preemption disabled at:
| [   10.726544][  T221] vprintk_emit (kernel/printk/printk.c:2471)
| [   10.726552][  T221] Tainted: [W]=WARN
[   10.726553][  T221] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.726555][  T221] Call Trace:
[   10.726557][  T221]  <TASK>
[   10.726558][  T221]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.726564][  T221]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   10.726566][  T221]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.726570][  T221]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.726574][  T221]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.726579][  T221]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   10.726581][  T221]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.726587][  T221]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   10.726589][  T221]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.726592][  T221]  put_chars (drivers/char/virtio_console.c:1176)
[   10.726595][  T221]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.726596][  T221]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   10.726600][  T221]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   10.726602][  T221]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.726606][  T221]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.726609][  T221]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.726611][  T221]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.726615][  T221]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.726617][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.726621][  T221]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.726624][  T221]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.726628][  T221]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.726632][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.726634][  T221]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.726638][  T221]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.726641][  T221]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.726643][  T221]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.726648][  T221]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.726650][  T221]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.726652][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.726654][  T221]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.726657][  T221]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.726659][  T221]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.726662][  T221]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.726665][  T221]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.726668][  T221]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   10.726674][  T221]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   10.726678][  T221]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   10.726682][  T221]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   10.726683][  T221]  ? idr_get_free (??:?)
[   10.726687][  T221]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   10.726690][  T221]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   10.726693][  T221]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   10.726696][  T221]  ? vprintk_default (kernel/printk/printk.c:2494)
[   10.726697][  T221]  ? handle_pte_fault (mm/memory.c:6558)
[   10.726702][  T221]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   10.726704][  T221]  ? vprintk_default (kernel/printk/printk.c:2494)
[   10.726707][  T221]  new_sync_write (fs/read_write.c:595)
[   10.726711][  T221]  ? new_sync_read (./include/linux/ioprio.h:41)
[   10.726713][  T221]  ? lock_vma_under_rcu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) mm/mmap_lock.c:329 (discriminator 2))
[   10.726721][  T221]  vfs_write (fs/read_write.c:687)
[   10.726725][  T221]  ksys_write (fs/read_write.c:739)
[   10.726727][  T221]  ? __ia32_sys_read (fs/read_write.c:723)
[   10.726730][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.726732][  T221]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.726735][  T221]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.726737][  T221]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.726740][  T221]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.726742][  T221] RIP: 0033:0x7fe0093e954e
[   10.726746][  T221] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   10.726748][  T221] RSP: 002b:00007ffe6ff597c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   10.726751][  T221] RAX: ffffffffffffffda RBX: 00007fe00956a580 RCX: 00007fe0093e954e
[   10.726753][  T221] RDX: 0000000000000021 RSI: 000055d0a6ad1060 RDI: 0000000000000001
[   10.726754][  T221] RBP: 00007ffe6ff597d0 R08: 0000000000000000 R09: 0000000000000000
[   10.726755][  T221] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021
[   10.726756][  T221] R13: 0000000000000021 R14: 000055d0a6ad1060 R15: 00007fe00956a668
| [   12.046261][  T272] softirqs last disabled at (10145): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   12.046264][  T272] Preemption disabled at:
| [   12.046264][  T272] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.046273][  T272] Tainted: [W]=WARN
[   12.046274][  T272] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.046276][  T272] Call Trace:
[   12.046277][  T272]  <TASK>
[   12.046279][  T272]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.046284][  T272]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.046286][  T272]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.046291][  T272]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.046294][  T272]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.046299][  T272]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   12.046301][  T272]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.046306][  T272]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   12.046309][  T272]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.046312][  T272]  put_chars (drivers/char/virtio_console.c:1176)
[   12.046315][  T272]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.046316][  T272]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   12.046320][  T272]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.046322][  T272]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.046327][  T272]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.046329][  T272]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.046335][  T272]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.046339][  T272]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.046342][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.046345][  T272]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.046349][  T272]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.046352][  T272]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.046357][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.046359][  T272]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.046362][  T272]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.046368][  T272]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.046370][  T272]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.046375][  T272]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.046377][  T272]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.046379][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.046381][  T272]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.046385][  T272]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.046386][  T272]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.046389][  T272]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.046393][  T272]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.046396][  T272]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   12.046401][  T272]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   12.046405][  T272]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   12.046409][  T272]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   12.046411][  T272]  ? idr_get_free (??:?)
[   12.046415][  T272]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   12.046418][  T272]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   12.046420][  T272]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   12.046423][  T272]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.046425][  T272]  ? handle_pte_fault (mm/memory.c:6558)
[   12.046430][  T272]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   12.046432][  T272]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.046434][  T272]  new_sync_write (fs/read_write.c:595)
[   12.046439][  T272]  ? new_sync_read (./include/linux/ioprio.h:41)
[   12.046441][  T272]  ? lock_vma_under_rcu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) mm/mmap_lock.c:329 (discriminator 2))
[   12.046449][  T272]  vfs_write (fs/read_write.c:687)
[   12.046453][  T272]  ksys_write (fs/read_write.c:739)
[   12.046455][  T272]  ? __ia32_sys_read (fs/read_write.c:723)
[   12.046458][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.046460][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.046463][  T272]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.046465][  T272]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.046468][  T272]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.046471][  T272] RIP: 0033:0x7fafe50e354e
[   12.046474][  T272] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   12.046476][  T272] RSP: 002b:00007ffe65763d50 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   12.046479][  T272] RAX: ffffffffffffffda RBX: 00007fafe5264580 RCX: 00007fafe50e354e
[   12.046480][  T272] RDX: 0000000000000021 RSI: 000055d6d7579060 RDI: 0000000000000001
[   12.046482][  T272] RBP: 00007ffe65763d60 R08: 0000000000000000 R09: 0000000000000000
[   12.046483][  T272] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021


Finger prints:
__irq_exit_rcu:vprintk_emit:dump_stack_lvl:__kmalloc_noprof:put_chars